42245999 has 2 divisors, whose sum is σ = 42246000. Its totient is φ = 42245998.

The previous prime is 42245989. The next prime is 42246007. The reversal of 42245999 is 99954224.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42245999 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42245989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21122999 + 21123000.

It is an arithmetic number, because the mean of its divisors is an integer number (21123000).

Almost surely, 2^42245999 is an apocalyptic number.

42245999 is a deficient number, since it is larger than the sum of its proper divisors (1).

42245999 is an equidigital number, since it uses as much as digits as its factorization.

42245999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 44.

The square root of 42245999 is about 6499.6922234826. The cubic root of 42245999 is about 348.2799938676.

The spelling of 42245999 in words is "forty-two million, two hundred forty-five thousand, nine hundred ninety-nine".